ProSet provides a function to add or edit existing users to the Transmille software system :

To add / edit users select the FILE > USER ACCESS PERMISSIONS menu item :

The current users configured on the system are displayed as shown below - 

simply add a new user or select the line to edit and update their details :

NOTE : A user does not have to use a password, this can be left blank if required 

(if no password is set, the user can login by selecting their name only without the system asking for a password)